US Bridges

US 3 Elm ST over Csx(abd)

Fair

Hillsborough County, New Hampshire · .2 MI N of JCT Rt 3A · Structure no. 016101440007500

Built
1915
110 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
74 ft
1 main span
Daily traffic
11,812
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

US 3 Elm ST over Csx(abd) is a steel stringer/multi-beam or girder carrying US 3 Elm ST over Csx(abd) in Hillsborough County, New Hampshire. It was built in 1915, so it is 110 years old, older than the New Hampshire average of 56.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 11,812 vehicles a day, roughly 5% of them trucks, projected to reach 17,481 by 2043. The structure is 74 ft (22.6 m) long and 100 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesUS 3 Elm ST
CrossesCsx(abd)
Location.2 MI N of JCT Rt 3A
RouteU.S. Route 3
CountyHillsborough County
StateNew Hampshire
Coordinates42.97912, -71.46306
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.3 US tons
Inventory rating23 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length74 ft (22.6 m)
Longest span68 ft (20.7 m)
Deck width100 ft (30.5 m)
Roadway width68 ft (20.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,812 (2023)
Projected traffic17,481 by 2043
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$314,000 (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 3 Elm ST over Csx(abd) built?

It was built in 1915, making it 110 years old in 2025.

What condition is US 3 Elm ST over Csx(abd) in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in July 2024.

How much traffic does US 3 Elm ST over Csx(abd) carry?

About 11,812 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is US 3 Elm ST over Csx(abd)?

The structure is 74 ft (22.6 m) long with a longest span of 68 ft (20.7 m) and a deck 100 ft wide.

Who owns US 3 Elm ST over Csx(abd)?

It is owned by the City or Municipal Highway Agency.